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Table 2 Corrected mortality of Sitophilus zeamais exposed to NeemPro® after 1, 3, 7 and 14 days on three maize varieties under laboratory conditions

From: Use of NeemPro®, a neem product to control maize weevil Sitophilus zeamais (Motsch.) (Coleoptera: Curculionidae) on three maize varieties in Cameroon

Maize variety/content (g/kg) % Mortality (mean ± SE)—exposure period (days)
1 3 7 14
CLH103
 0 0 ± 0 0 ± 0c 0 ± 0b 0 ± 0c
 0.75 0 ± 0 5 ± 2bc 32.5 ± 13.92ab 42.5 ± 9.24b
 1.5 0 ± 0 30 ± 13.69abc 52.5 ± 22.59ab 92.5 ± 4.33a
 3 0 ± 0 30 ± 3.54ab 71.25 ± 15.73a 92.5 ± 4.33a
 6 2.5 ± 1.44 43.75 ± 11.43a 76.25 ± 12.81a 100 ± 0a
 F value 3 ns 4.83* 4.36* 75.94***
CMS8501
 0 0 ± 0 0 ± 0b 0 ± 0d 0 ± 0c
 0.75 0 ± 0 3.75 ± 2.39b 19.73 ± 4.11c 17.73 ± 6.48bc
 1.5 0 ± 0 7.5 ± 3.23ab 56.78 ± 8.04b 57.95 ± 20.73ab
 3 0 ± 0 17.5 ± 5.95ab 77.80 ± 12.37ab 87.65 ± 6.15a
 6 1.25 ± 1.25 38.75 ± 11.43a 93.1 ± 4.28a 94.55 ± 2.42a
 F value 1 ns 6.63** 32.99*** 16.28***
SHABA
 0 0 ± 0 0 ± 0c 0 ± 0b 0 ± 0c
 0.75 0 ± 0 3.75 ± 2.39bc 10 ± 4.56b 10.45 ± 3.56bc
 1.5 0 ± 0 8.75 ± 1.25ab 24.25 ± 13.75ab 26.20 ± 5.18b
 3 0 ± 0 12.5 ± 3.23ab 55 ± 9.35a 67.58 ± 11.92a
 6 0 ± 0 25 ± 7.36a 63.75 ± 12.64a 89.13 ± 6.32a
 F value 6.47** 8.4*** 33.18***
  1. Means in the same column for the same maize variety, followed by the same letter do not differ significantly at P = 0.05 (Tukey’s test); Number of replicates: 4; * P < 0.05; ** P < 0.01; *** P < 0.001; F value: a ratio of two variances—the “between group” variance and the “within-group” variance